DATA LOGGER

Last week the Hantek 365A Data Logger arrived and will be used to log the first charge with the new PIC chip controlling the Zivan NG3 charger. For $75 I thought this logger would be a good addition to my test equipment. It is also available with Bluetooth for a little higher price, and that may be a good feature to have if you are using a tablet to save the log files.

HANTEK 365A DATA LOGGER

The Hantek 365A can record voltage, current, capacitance, and resistance. The sample rate can be adjusted and the data file can be exported to a log file on a computer, so it can be graphed. I am especially interested in the voltage climb at the end of the charge on the Better Place battery module, as it seems it is still rather flat when you approach 4.2 volts per cell. The PIC chip has been set up to end the charge at 137.5 or 4.3 volts per cell and has been charged to this level in the past, with no apparent heating or gassing of the cells.

When the new PIC chip is tested and the log file from the Hantek logger is graphed, I will post the results.

Thanks for visiting,

Randy

MERRY CHRISTMAS!

We have had a great year at CZ-EV and wish you and yours a Merry Christmas!

A special thanks to the builders in Ohio who have always been there to lend a helping hand when called upon!

The bottom balancing of the Better Place modules has been going well and the second module is all most done. The trick seems to be ending the bottom balance with a charge instead of a discharge. I had two cells that were still at 3 volts and discharged them to 2.91 volts before charging them back up to 2.95 volts. I have noticed that when discharging, the cells always come back up to close to 3 volts but after a charge at low amperage, will stat at 2.95 volts or drop a volt or so after charging. I am going to try to do a video of my second module bottom balancing and hope it will be useful for any of you still working on bottom balancing a Better Place battery module.

Hoping for a great 2015,

Randy